"I'm pretty sure when you use the UTC offset, you put in the offset ignoring DST, so -0500 refers to Eastern Standard Time (EST), but during DST it will know to use -0400 (EDT)." How does it know you're in EST and not some other timezone with offset -0500? Use one of these values: http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/topic/com.ibm.websp... E.g. "US/Eastern" to be explicit... One thing to check is the value of "user.timezone" if you're setting it... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052767#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...